.header {
    width: 100%;
    height: 44px;
}
.header h1 {
    position: fixed;
    z-index: 11;
    top: 0;
    left: 0;
    background-color: #333;
    height: 44px;
    width: 100%;
    color: #fff;
}
.header h1 span {
    position: relative;
    z-index: 10;
    display: block;
    height: 44px;
    padding: 0 88px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 44px;
    text-align: center;
}
.header h1 span a {
    position: absolute;
    top:  0;
    z-index: 10;
    display: block;
    width: 44px;
    height: 44px;
    line-height: 44px;
    overflow: hidden;
    text-align: center;
    color: #fff;
    font-size: 12px;
}
.header h1 span a.l1 { left: 0;}
.header h1 span a.l2 { left: 44px;}
.header h1 span a.r1 { right: 0;}
.header h1 span a.r2 { right: 44px;}